Follow up crrev.com/c/771693: fix comment

Bug: 784911
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ia01f0d2e9e4a32607c0bd0c18228564110585909
Reviewed-on: https://chromium-review.googlesource.com/776881Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517428}

ios/chrome/browser/ui/toolbar/clean/toolbar_coordinator.h

@@ -25,7 +25,7 @@ class ChromeBrowserState;
 @property(nonatomic, weak) id<ApplicationCommands, BrowserCommands> dispatcher;
 // The web state list this ToolbarCoordinator is handling.
 @property(nonatomic, assign) WebStateList* webStateList;
-// Audience, notified of the
+// Delegate for this coordinator.
 @property(nonatomic, weak) id<ToolbarCoordinatorDelegate> delegate;
 // URL loader for the toolbar.
 @property(nonatomic, weak) id<UrlLoader> URLLoader;